Question

Monosomic females with rudimentary ovaries and lacking secondary sexual characters suffer from _____________.

• A. Turner’s syndrome
• B. Klinefelter’s syndrome
• C. Down’s syndrome
• D. Edwards syndrome

Answer 1

The correct option is A Turner’s syndrome

Turner’s syndrome is a chromosomal disorder in human beings characterised by the absence of one of the X chromosomes in the females. Normal females have two X chromosomes. The affected females are sterile with rudimentary ovaries and lack secondary sexual characters.

The absence of one chromosome is called monosomy (2n-1) and females exhibiting monosomy are called monosomic females.

Klinefelter’s syndrome is a chromosomal disorder characterised by the presence of an extra X chromosome in the human males and hence the affected individuals have three sex chromosomes (XXY).
This condition is termed as trisomy of sex chromosomes.

The affected individuals display overall masculine development, however, the feminine characters like development of breast, i.e., gynecomastia are also seen. The affected individuals are sterile.

Down’s syndrome is a chromosomal disorder which is characterised by the trisomy of the ${21}^{st}$ chromosome. The affected individuals have a short stature with rounded head, furrowed tongue, wide palm with distinct palm crease and retarded physical, mental and psychomotor development.

Edwards syndrome, a chromosomal disorder which is characterised by the trisomic condition of chromosome 18. The affected individuals have small and abnormally shaped head and jaws, arched spine, and birth defects in many organs.